Set variable value before execution programmatically

[erimary24]

I'm using Elsa 3.2, in a custom INotificationHandler<WorkflowExecuting> I want to add a new variable to the workflow variables before its execution; the problem is that WorkflowExecutionContext.Variables is immutable... how can I do?

[jdevillard]

Hello,

what have you done ?

For example, I use : INotificationHandler<WorkflowExecuting>

And then in the implementation

public Task HandleAsync(WorkflowExecuting notification, CancellationToken cancellationToken)
{
    notification.Workflow.Variables.Add(new Elsa.Workflows.Memory.Variable("MyCustomVariable", "MyCustomValue"));
         
}

This should works.

[erimary24]

It works, thank you!

My code wasn't working because I used "notification.WorkflowExecutionContext.Variables" instead of "notification.Workflow.Variables"... What is the difference between these two?